Mower blade



FIG. 1 is a top, front perspective view of a mower blade showing our new design;

FIG. 2 is a top plan view thereof; and,

FIG. 3 is a bottom plan view thereof.

The broken lines depict portions of the mower blade that form no part of the claimed design. 

CLAIM The ornamental design for a mower blade, as shown and described. 